Cope.] ^"O [June 20, 



short, not exceeding the length of the astragalus more than the fifth of its 

 own length. The digital dilatations arc well developed on both extremi- 

 ties ; the posterior digits are two thirds webbed, while the anterior are 

 scarcely one-fourth palmate. The species is particularly characterized by 

 the abbreviation and flatness of the head, which is also wide. Thecanthus 

 rost rales are distinct and very convergent ; the muzzle is truncate vertically, 

 but projects a little beyond the mandible. The nostrils are terminal and 

 lateral, and are as far anterior to the eye as the long diameter of the latter. 

 The latter dimension is four times the diameter of the tympanum, and is 

 equal to the interorbital width. The skin of the superior surface is every- 

 where smooth. The thorax, belly and inferior face of part of femora are 

 areolate. 



The color in spirits is light ashen above, rather darker on the head. 

 Canthus rostralis dark shaded. Inferior surfaces light orange. No mark- 

 ings on the sides or concealed faces of the limbs, nor on the superior faces 

 of the limbs. 



Length of head and body, .033 ; length of head to angle of jaws, axially, 

 .007; width of head posteriorly, .011 ; length of fore limb, .015 ; of hind 

 limb, .045 ; of hind foot, .019. 



This is the first of the genus detected in the Mexican district. It is larger 

 than the H. carnea Cope, of Brazil, has a weaker palmation of the fingers, 

 and more uniform coloration. 



From Japana, from an elevation of from 2000 to 3000 feet. It is found 

 in the tufts of epiphytic Tillandsm and M. Sumichrast thinks it undergoes 

 its metamorphoses there, in rainwater held in the axils of the leaves. 



15. Lithodytes rhodopis Cope, 10020 (No. 8). 



16. Lithodytes podiciferus Cope. 



17. Syrrhophus leprus, sp. nov. 



The genus Syrrhophus was proposed by me in 1878* to receive frogs 

 allied to Phyllobates, but with largely developed nasal bones, which meet 

 on the middle line, as in Ilylodes, thus covering the ethmoid cartilage. 

 The typical species is the 8. marnochii of West Texas ; a second species is 

 the S. cystignathoides Cope,f and the present frog increases the number to 

 three. These species are distinguished as follows : 

 Posterior limbs short, heel to tympanum; head wide; tympanum half 



orbit ; rufous, brown spotted S. marnochii. 



Posterior limbs longer, heel to front of orbit ; head wide, a canthus ros- 

 tralis ; tympanum one-third orbit ; brown, pale spotted S. leprus. 



Posterior limbs longer, heel to front of orbit ; head narrow, no canthus ros- 

 tralis ; tympanum one-third orbit ; brown, dark spotted, 



S. cystignatlioides. 

 In the S. leprus the muzzle is broadly acuminate and obtuse, with ver- 

 tical profile ; nares lateral and terminal, and as far from the orbit as the 

 diameter of the latter. Lores vertical. Eye not prominent upwards. 



* American Naturalist, p. 253. 



f Phyllobates, Proceed! Am. Philos. Soc, 1877, p. 89. 



